Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Honjo Koken aluminum benders

Search
Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Honjo Koken aluminum benders

Thread Tools
 
Search this Thread
 
Old 09-09-16, 02:23 PM
  #1  
PM me your cotters
Thread Starter
 
francophile's Avatar
 
Join Date: Jun 2015
Location: ATL
Posts: 3,241
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 1137 Post(s)
Liked 590 Times in 422 Posts
Honjo Koken aluminum benders

"Benders". That's what I guess you call them when someone kicks the $#%@$ out of your box in transit at just the right spot?

I've never had much luck getting half-round stuff straight after something like this, much less the more squared fenders I'm accustomed to.

I will say, though... TPC was straight-up classy about it, full refund. Now I need to find someone better with metal than I to re-bend them, and gotta find mounting hardware (I see VO sells some bits)

"Pro tips" welcome on this one.
Attached Images
File Type: jpg
IMG_4703.jpg (94.7 KB, 179 views)
File Type: jpg
IMG_4704.jpg (89.8 KB, 180 views)
File Type: jpg
IMG_4702.jpg (95.2 KB, 179 views)
francophile is offline  
Old 09-09-16, 02:28 PM
  #2  
Senior Member
 
himespau's Avatar
 
Join Date: Jun 2008
Location: Louisville, KY
Posts: 13,444
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 4232 Post(s)
Liked 2,947 Times in 1,806 Posts
Ouch.
himespau is offline  
Old 09-09-16, 02:32 PM
  #3  
Heck on Wheels
 
SloButWide's Avatar
 
Join Date: Sep 2015
Location: USA Midwest
Posts: 1,055

Bikes: In Signature

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 206 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
If you know people who are into custom motorcycles, ask them where they get their sheet metal done. Look for a friend-of-a-friend who does it as a sideline/hobby, because a pro with a one hour minimum would charge more than you might be willing to invest.
__________________
"I had a great ride this morning, except for that part about winding up at work."

Bikes so far: 2011 Felt Z85, 80's Raleigh Sovereign (USA), 91 Bianchi Peregrine, 91 Austro-Daimler Pathfinder, 90's Trek 730 Multitrack, STOLEN: 80 Schwinn Voyageur (Japan)

SloButWide is offline  
Old 09-09-16, 02:42 PM
  #4  
PM me your cotters
Thread Starter
 
francophile's Avatar
 
Join Date: Jun 2015
Location: ATL
Posts: 3,241
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 1137 Post(s)
Liked 590 Times in 422 Posts
I only paid ~$20 for them shipped so I'm not heavily out and could afford it. Was hoping to save anything over $20 to get hardware though.

The kink is my main concern, if I could get around that I think I could fix it. I'm wondering if my cotter press (VAR) would manage that, actually? It can exert manageable middle pressure on something...
francophile is offline  
Old 09-10-16, 12:07 AM
  #5  
Senior Member
 
cinco's Avatar
 
Join Date: Dec 2006
Location: Colorado
Posts: 568

Bikes: Forty of them

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 99 Post(s)
Likes: 0
Liked 33 Times in 21 Posts
Man, those look hammered.

Ahem.

Your best bet may be to apply some front/rear spreading pressure with a hand and a foot while massaging the area of the kink with the other hand. Double entendre notwithstanding, most bends like that can be more-or-less brought back by hand with minimal trouble. Keep in mind that aluminum doesn't like to bend twice and that you'll likely never get that rolled lip perfect, but you might end up with something you'd have to point out for anyone to notice. Just go slow and think about the movement you want the metal to go through while you're working.
cinco is offline  
Old 09-10-16, 04:36 AM
  #6  
Banned.
 
Join Date: Jul 2016
Location: downtown Bulverde, Texas
Posts: 2,717

Bikes: '74 Raleigh International utility; '98 Moser Forma road; '92 Viner Pro CX upright

Mentioned: 44 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
At that price, I'd forge on them a bit myself and straighten them out.
Even my new purchase from Jitehsha arrived with a slight shipping ding that I straightened - not perfect, but I'm probably the only one who notices. Wooden blocks make good anvils...

bulldog1935 is offline  
Old 09-10-16, 06:36 AM
  #7  
Senior Member
 
poprad's Avatar
 
Join Date: Jun 2005
Location: In transit
Posts: 1,897

Bikes: 07 Vanilla, 98 IRD road frame built up with 25th Ann DA, Surly cross check with 105 comp, 78 Raleigh Comp GS, 85 Centurionelli

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
Liked 923 Times in 191 Posts
I second Bulldog's advice. When I fitted my Honjos they were pretty easy to bend to reduce/increase the radius (by either squeezing together or opening the width of the trough along its length). The aluminum used is a pretty soft variety, I bet you could use some old tires between the jaws of a pair of vise grips with slightly increasing pressure until you got the kink to flatten. I think you'll be surprised how easily the metal can be formed.
poprad is offline  
Old 09-10-16, 06:41 AM
  #8  
Extraordinary Magnitude
 
The Golden Boy's Avatar
 
Join Date: Aug 2009
Location: Waukesha WI
Posts: 13,646

Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 2608 Post(s)
Liked 1,699 Times in 935 Posts
Originally Posted by francophile
Now I need to find someone better with metal than I to re-bend them,
"mettle"

met·tle
ˈmedl/
noun
noun: mettle; plural noun: mettles
a person's ability to cope well with difficulties or to face a demanding situation in a spirited and resilient way.





Sorry
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*

Commence to jigglin’ huh?!?!

"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
The Golden Boy is offline  
Old 09-10-16, 10:45 AM
  #9  
Banned.
 
Join Date: Jul 2016
Location: downtown Bulverde, Texas
Posts: 2,717

Bikes: '74 Raleigh International utility; '98 Moser Forma road; '92 Viner Pro CX upright

Mentioned: 44 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
Originally Posted by poprad
I second Bulldog's advice. When I fitted my Honjos they were pretty easy to bend to reduce/increase the radius (by either squeezing together or opening the width of the trough along its length). The aluminum used is a pretty soft variety, I bet you could use some old tires between the jaws of a pair of vise grips with slightly increasing pressure until you got the kink to flatten. I think you'll be surprised how easily the metal can be formed.
I have some nylon-jawed pliers (I work on OPs valuable antique fishing reels), and they work great - I've used them on my Honjo fenders.
bulldog1935 is offline  
Old 09-10-16, 10:58 AM
  #10  
PM me your cotters
Thread Starter
 
francophile's Avatar
 
Join Date: Jun 2015
Location: ATL
Posts: 3,241
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 1137 Post(s)
Liked 590 Times in 422 Posts
Thanks for the advice, all!

I'm going to tinker with these in the shop later today, will see how it pans out. I'll post an update.

Originally Posted by The Golden Boy
noun
noun: mettle; plural noun: mettles
a person's ability to cope well with difficulties or to face a demanding situation in a spirited and resilient way.



Sorry
No worries, word humor is always appreciated here!
francophile is offline  
Old 09-10-16, 09:24 PM
  #11  
Bike Butcher of Portland
 
gugie's Avatar
 
Join Date: Jul 2014
Location: Portland, OR
Posts: 11,634

Bikes: It's complicated.

Mentioned: 1299 Post(s)
Tagged: 0 Thread(s)
Quoted: 4678 Post(s)
Liked 5,795 Times in 2,281 Posts
I received a practically completely flattened Lefol fender set from eBay france. Rather than contact the seller (price was pretty good), I decided to try and salvage it. I have a set of hole saws, and determined that a 2 3/4" sized one was approximately the same radius as the fender (65mm). I cut out a piece of 2x4, but offset it so that there was a flat spot in the cut-off piece.

Now I put the fender into the 2x4 "hole" that was left, and tapped the cuttoff into the fender, starting at a spot where the fender was still "round". I fed the fender into the "hole" bit by bit, and found that when I went from one end to the other, the fender was pretty dang straight.

I really should have made pictures, or a video of the entire process, next time I have an opportunity I'll do so.
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
gugie is offline  
Old 09-11-16, 09:28 AM
  #12  
Senior Member
 
Join Date: Feb 2015
Location: Chicago
Posts: 93

Bikes: 1973 Jack Taylor ToB, 1974 or '75 LeJeune Champ du Monde (possibly from the Carre Shop), 1971 Motobecane Le Champion, 1980s Rodriguez frame (future 650b conversion project)

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked 7 Times in 6 Posts
Thanks, @gugie, that's a great tip. I suppose you could do the same to open up or shorten the radius, tho maybe the hand-only technique works well enough not too bother. Anyway, glad to have another trick in the arsenal.
--

Originally Posted by gugie
I received a practically completely flattened Lefol fender set from eBay france. Rather than contact the seller (price was pretty good), I decided to try and salvage it. I have a set of hole saws, and determined that a 2 3/4" sized one was approximately the same radius as the fender (65mm). I cut out a piece of 2x4, but offset it so that there was a flat spot in the cut-off piece.

Now I put the fender into the 2x4 "hole" that was left, and tapped the cuttoff into the fender, starting at a spot where the fender was still "round". I fed the fender into the "hole" bit by bit, and found that when I went from one end to the other, the fender was pretty dang straight.

I really should have made pictures, or a video of the entire process, next time I have an opportunity I'll do so.
JT1973 is offline  
Old 09-11-16, 02:31 PM
  #13  
PM me your cotters
Thread Starter
 
francophile's Avatar
 
Join Date: Jun 2015
Location: ATL
Posts: 3,241
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 1137 Post(s)
Liked 590 Times in 422 Posts
Originally Posted by gugie
Now I put the fender into the 2x4 "hole" that was left, and tapped the cuttoff into the fender, starting at a spot where the fender was still "round". I fed the fender into the "hole" bit by bit, and found that when I went from one end to the other, the fender was pretty dang straight.
That sounds way more elaborate than what I ended up with, but so does your damage. In fact, I feel sort of stupid for complaining about my little bend after hearing about yours!

I was sitting in the shop last night helping a friend tear down his "new" Trek 400 (I'm teaching him to rebuild) and I looked up on the wall and saw my rubber Quick-grip clips I use for damn near everything and had a wild thought.

Maybe exerting pressure from either side of the bend would push them back into shape?



End result isn't "perfect", but it's good enough for gov't work. I don't have a clever way to re-crimp the inside of the fender lip in a way that's clean enough it won't collapse the rollover metal. I've got a wide variety of tools in the shop from other hobbies, but nothing well-suited to the task, so I opted to leave "good enough" alone.



francophile is offline  
Old 09-11-16, 03:53 PM
  #14  
Senior Member
 
himespau's Avatar
 
Join Date: Jun 2008
Location: Louisville, KY
Posts: 13,444
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 4232 Post(s)
Liked 2,947 Times in 1,806 Posts
Wow, that looks pretty nice.
himespau is offline  
Old 09-11-16, 07:04 PM
  #15  
Bike Butcher of Portland
 
gugie's Avatar
 
Join Date: Jul 2014
Location: Portland, OR
Posts: 11,634

Bikes: It's complicated.

Mentioned: 1299 Post(s)
Tagged: 0 Thread(s)
Quoted: 4678 Post(s)
Liked 5,795 Times in 2,281 Posts
Here's a pic of the "tool" I referenced earlier:



2x4, hole saw, size the hole "next size bigger" than the fender - 1/8" larger is about right. Offset it from the edge so that the pilot hole is just off the edge of the wood.. Place the fender in the cutout and pound the bung* into the fender. Remove bung, move the fender up a bit, and repeat.

Even aluminum has a bit of elasticity to it, so you're thinking you're overdoing it, but when you pull the bung out, it'll spring back a bit.

*hey, it's my tool, I get to name the parts.
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
gugie is offline  
Old 09-11-16, 07:13 PM
  #16  
PM me your cotters
Thread Starter
 
francophile's Avatar
 
Join Date: Jun 2015
Location: ATL
Posts: 3,241
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 1137 Post(s)
Liked 590 Times in 422 Posts
Originally Posted by gugie
2x4, hole saw, size the hole "next size bigger" than the fender - 1/8" larger is about right. Offset it from the edge so that the pilot hole is just off the edge of the wood.. Place the fender in the cutout and pound the bung* into the fender. Remove bung, move the fender up a bit, and repeat.

Even aluminum has a bit of elasticity to it, so you're thinking you're overdoing it, but when you pull the bung out, it'll spring back a bit.

*hey, it's my tool, I get to name the parts.
That's pretty damn thoughtful, @gugie

How did you prevent flattening the rolled lip with the "bung"?
francophile is offline  
Old 09-11-16, 07:23 PM
  #17  
Bike Butcher of Portland
 
gugie's Avatar
 
Join Date: Jul 2014
Location: Portland, OR
Posts: 11,634

Bikes: It's complicated.

Mentioned: 1299 Post(s)
Tagged: 0 Thread(s)
Quoted: 4678 Post(s)
Liked 5,795 Times in 2,281 Posts
Originally Posted by francophile
How did you prevent flattening the rolled lip with the "bung"?
Vintage Lefol fenders have a pretty big rolled lip*, so the didn't flatten out much. The parts that were flattened, already were. I made another tool out of an old pair of pliers and a grinder, creating a "lip" on the tool so I could get in there and pull it gack out. A ground down spoke is another tool. Honjo and vintage fenders have a big enough lip to hide a 22ga wire to power a tail light, vintage french style, using the fender/frame as the ground path.

technically, in sheet metal it's called a "hem". Just like your pant legs.
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
gugie is offline  
Old 09-11-16, 07:37 PM
  #18  
PM me your cotters
Thread Starter
 
francophile's Avatar
 
Join Date: Jun 2015
Location: ATL
Posts: 3,241
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 1137 Post(s)
Liked 590 Times in 422 Posts
Originally Posted by gugie
technically, in sheet metal it's called a "hem". Just like your pant legs.
Interesting, I never knew that. I've used specialty tools to roll fenders in the auto customization world, and I'd always heard this called a "rolled lip". I admittedly know very, very little about metal work and wood work, though, so I appreciate the info!
francophile is offline  
Old 09-11-16, 07:39 PM
  #19  
Bike Butcher of Portland
 
gugie's Avatar
 
Join Date: Jul 2014
Location: Portland, OR
Posts: 11,634

Bikes: It's complicated.

Mentioned: 1299 Post(s)
Tagged: 0 Thread(s)
Quoted: 4678 Post(s)
Liked 5,795 Times in 2,281 Posts
Originally Posted by francophile
Interesting, I never knew that. I've used specialty tools to roll fenders in the auto customization world, and I'd always heard this called a "rolled lip". I admittedly know very, very little about metal work and wood work, though, so I appreciate the info!
Yeah, more random trivia: SheetMetal.Me ? Sheet Metal Hems
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
gugie is offline  
Old 09-11-16, 07:57 PM
  #20  
PM me your cotters
Thread Starter
 
francophile's Avatar
 
Join Date: Jun 2015
Location: ATL
Posts: 3,241
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 1137 Post(s)
Liked 590 Times in 422 Posts
Originally Posted by gugie
Yeah, more random trivia: SheetMetal.Me ? Sheet Metal Hems
Sometimes I wish posts could be +1'd or thumbed up.

So a teardrop hem it is. I probably have metal wire smaller than a coathanger that would help to re-round the hem. I'm going to test-fit the fenders on the bike that was expecting them.
francophile is offline  
Old 09-12-16, 06:34 AM
  #21  
Banned.
 
Join Date: Jul 2016
Location: downtown Bulverde, Texas
Posts: 2,717

Bikes: '74 Raleigh International utility; '98 Moser Forma road; '92 Viner Pro CX upright

Mentioned: 44 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
excellent job - no one will notice the divots
bulldog1935 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
brianinc-ville
Classic & Vintage
0
08-04-15 10:07 AM
namegoeshere808
Singlespeed & Fixed Gear
9
05-08-14 09:16 PM
WalksOn2Wheels
Classic & Vintage
8
11-10-13 11:05 PM
noglider
Classic & Vintage
5
04-27-10 08:08 PM
ClydesterD
Touring
14
12-22-09 10:38 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.